Which channel is best for WiFi?

Given the same transmitter output power, in the absence of ANY interference, the lowest-frequency channel will nearly always be the best . This is because higher-frequency radio waves do not penetrate matter (including air) as well as lower-frequency waves.

Selecting the proper Wi-Fi channel can significantly improve your Wi-Fi coverage and performance . In the 2.4 GHz band, 1, 6, and 11 are the only non-overlapping channels. Selecting one or more of these channels is an important part of setting up your network correctly.

For best results, it is highly recommended to keep the 2.4 GHz channels to 1, 6, and 11 , as these channel settings will allow for virtually no overlap in the WiFi signal.

When using 5 GHz, it is recommended to use at least 40 MHz channel width, as some client devices may not prefer 5 GHz unless it offers a greater channel width than 2.4 GHz.